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Injuries of the supra-aortic trunk after blunt chest trauma are rare. This is a case report of a blunt traumatic lesion of the innominate artery (IA) origin that exhibited aortic arch involvement with a focus on imaging and treatment. A 41-year-old fisherman presented an IA injury secondary to a high-impact blunt chest trauma. Upon physical examination, vital signs were stable and upper extremity pulses were present. In addition to several bone fractures (costal ribs, clavicle, scapula, temporal, maxillary, and sphenoid), computed tomography angiography revealed dissection/pseudoaneurysm of the IA sparing the bifurcation. The patient underwent emergent angiography, which confirmed that the IA dissection was not ruptured, but it was unclear whether there was a pseudoaneurysm at the origin of the IA or aortic arch involvement. The patient was considered for open surgery. An ascending aorta-to-IA bypass was achieved by the off-pump beating heart approach. The IA stump was carefully observed, but oversewing was not possible due to the extension of the intimal-medial lesions into the artic arch. An on-pump intervention was then required for aortic angioplasty with a pericardial patch that was reinforced by Gel Seal. The postoperative course was uneventful. The patient was discharged without any complications. Conventional surgery provides good results and should remain in the armamentarium for the treatment of traumatic lesions at the IA origin, particularly if aortic arch involvement cannot be ruled out, to ensure a truly patient-tailored approach.